Why can not the urea aqueous solution instead of the general automotive vehicle urea solution is a urea solution with a urea-based chemical reactants, mixture of urea and high purity deionized water is made at a concentration of 32.5% solution. The car used by urea solution SCR (Selective Catalytic Reduction) system, is a key engine exhaust emissions to meet State IV emission standard and above. Selection of different quality urea solution, for the maintenance of vehicles are different. Resulting purity urea solution elected by enough, particulate matter, heavy metals and other impurities present time, the vehicle will SCR system nozzles, filters and other parts of serious harm, unnecessary economic losses. Low quality urea solution is not high if the chemical composition, the presence of heavy metals and other chemicals when chemically react with the catalyst to reduce exhaust gas conversion effect, even useless. Therefore, when the urea solution in the selection should try to use high-quality products, in order to control the maintenance cost of the vehicle. General performance indicators to measure and evaluate the traditional activated carbon adsorption, including iodine value, methylene blue adsorption, carbon tetrachloride adsorption, surface area, milling strength and ash, etc., especially iodine value, methylene blue, and carbon tetrachloride value, direct response the activated carbon adsorption of organic matter. But often appear activated carbon adsorption performance in general and field test results do not match, the relevant question is not good car how to use urea solution, mainly due to iodine value, methylene blue value, and carbon tetrachloride adsorption, etc. is the use of small molecules (such as Molecular iodine diameter of about 1-1.5nm, methylene blue molecule diameter between 1.5-1.8nm, carbon tetrachloride molecule diameter of 0.71nm) adsorption test, the measured absorption values ??are representative of these small molecules to activated carbon the role of urea solution organics adsorption capacity of vehicles, and these small molecules compared to activated carbon adsorption treatment object, and there is a big difference in the molecular volume. Small molecules can reach many microporous activated carbon inside the car with urea solution, macromolecules can not go in, of course, where to buy a car and can not be adsorbed urea solution, so the small molecule strong adsorption capacity of macromolecules The adsorption is not necessarily good. Characterized by a specific surface area also has the same problem, the amount of adsorption of organic molecules in water depends on the pore size distribution of activated carbon instead of the activated carbon the specific surface area, however, by measuring the pore size distribution of activated carbon like activated carbon is selected relatively time-consuming, laborious. What car is using urea solution | East Delta Chi Chemical (certified) | Automotive urea solution provided by Delta Chi Chemical Co., Ltd. Jinan East. Jinan East Delta Chi Chemical Co. (sddqhd.com) is a leader in Jinan, chemical equipment, over the years, the company is implementing the scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customer needs. East Delta Chi Chemical leadership with the staff warmly welcome all inquiries negotiations to create the East Delta Chi Chemical better future.